Extremist group Boko Haram is believed to be behind the deadly blast.

At least 30 people have been killed in twin suicide explosions in the northwest of Nigeria on Friday after two female suicide bombers disguised as customers in a local market carried out the attack in the town of Madagali in the northwestern Adamawa state, according to the Nigerian army.

"The attack in Madagali was carried out by two female school children. They detonated two bombs at the same time killing 30 people and they also died," said Major Badare Akintoye, a Nigerian army spokesperson.

More than 50 people were believed to be injured in the attack and the scene was being evacuated. While no group has claimed responsibility, extremist organization Boko Haram has been blamed.

The attack was similar to a number of others that the group has carried out by targeting crowded public areas. The blast was the third in the Madagali since December 2015. The town was captured by Boko Haram in 2014 before being liberated.

The group has been waging a seven-year campaign against the Nigerian government to impose a hardline system of Islamic law in the northeast of the country.

Since 2009, Boko Haram's violence has displaced around 2.6 million people and killed at least 20,000 people and has included abductions, civilian slaughters and suicide attacks neighboring Cameroon and Niger.